Conditional substring in a Jinja2 template

There is a nicer "oneliner": {{ name | regex_replace('-p$','') }}.

Found it.

If anyone wants to know:

{% if name.endswith('-p') %}
{{ name[:-2] }}
{% else %}
{{ name }}
{% endif %}

For simple substring ...

"{{var_name[start:end]}}"

where start is starting position (offset 0) and end is end position (offset 1) ... it seems!

The title of this question suggests just wanting to get a substring from a variable. And most other search results have similar titles but then give a specific response like splitting paths etc. This is for those of you that, like me, had trouble finding such a basic thing.